Just entered the 10mm world round gun style

[Zeke38]

Just purchased a Lipsey's 5 inch 10mm GP100. Been curious about the cartridge in a revolver. Only shot it a few rounds 30, but it's accurate and fun to shoot. Going to enjoy wringing this caliber out!
https://i.imgur.com/1XrcTNX.jpg

[Rock185]

I guess I'm kind of a 10MM revolver fan. I had a couple of early 5" S&W 610s back in the early '90s, and later one of those "Buckeye" Ruger 38-40/10MM convertible Blackhawks. Never shot a single round of 38-40 through the Blackhawk.

Hope your 5" GP100 10MM works out well, I recently bought one myself;)

[OlongJohnson]

Do your stocks fit, or do they rattle?

[Zeke38]

Olong the stocks fit tight so far. I have an identical set I purchased from Altamont a year or so ago and I had to sand and shim to get them to sorta fit. The mid seam on the grip is fairly sealed but not seamless like the VZs on other model handguns. I'll send you the other set to see if they fit yours. These in the pic were on my MC.

https://i.imgur.com/He7MuFo.jpg

[kihnspiracy]

Nice. Did you shoot any .40 S&W thru it? Does that model come in stainless? I tried searching fo a Smith 610 pre-lock version, but most sellers want more than I am willing to pay.

[Zeke38]

I did shoot 6 rounds of Double Tap 180 40 S&W through the Ruger using the Ruger Moonclips that came with the gun. All six fired without a problem. Just a curiousity sample, shot tight too. One hole ten yds on a head shot target. I used to carry a 40 and have lots of brass and ammo. Will keep you posted. Have the Double Tap load as a SD load right now. Still accumulating components and equipment for the 10.

[JRB]

Lipsey's has a run of stainless convertible Blackhawks in .40 & 10mm. They offer a 4.62in or a 6.5in barrel variant. Right as I decided on the 4.62in, they sold out which I think was a message. I haven't decided if I want the 6.5in of that flavor, or to find a blued 10mm GP100 just like Zeke's.

But a 10mm wheel gun is really the last thing I need right now, but I *want* it and with all that's going on, buying something I want that isn't terribly practical seems like good medicine for the soul.

[Rock185]

FWIW, I did fair amount of chronographing back in the day with my 5" S&W 610 revolvers, and various 10MM semi-autos with 4.25" and 5" barrels. More often than not, the revolvers produced higher velocities with a given load. For instance, factory CorBon 135 grain JHP averaged 1475 FPS in a 5" semi-auto, 1585 FPS in a 5" 610 Revolver. I've not had the opportunity to chronograph loads in the Lipseys 5" Ruger, and compare to my one remaining 5" 10MM semi-auto, but I'm going to do that as soon as the opportunity presents.

JRB, I sure didn't need another firearm of any type. The Lipseys revolver was just one of those "good medicine for the soul" things you mentioned;)

[JRB]

FWIW, I did fair amount of chronographing back in the day with my 5" S&W 610 revolvers, and various 10MM semi-autos with 4.25" and 5" barrels. More often than not, the revolvers produced higher velocities with a given load. For instance, factory CorBon 135 grain JHP averaged 1475 FPS in a 5" semi-auto, 1585 FPS in a 5" 610 Revolver. I've not had the opportunity to chronograph loads in the Lipseys 5" Ruger, and compare to my one remaining 5" 10MM semi-auto, but I'm going to do that as soon as the opportunity presents.

JRB, I sure didn't need another firearm of any type. The Lipseys revolver was just one of those "good medicine for the soul" things you mentioned;)

A 1076 is a 'bucket list' gun for me (one of the very tip-top of that list, no less) so I adore that beast you shared there! I didn't know they did the frame decocker on a 5in gun, what variant is that?

I don't know if it's because I'm approaching my 40's, or if it's a simple inescapable truth - but I've found that basically all revolvers are 'good medicine for the soul'. :)

[Rock185]

My current 5" S&W is a 1026. I had two, or maybe it was three, 1076s. I suspect one was one of those FBI guns, but I never cared enough to confirm it. Didn't realize that one day a 1076 lettered to the FBI would be a $$$$ collectible. In any case the 1076s, FBI or not, were fine, totally reliable guns that handled the "real" 10MM ammo without issue. Interestingly I thought, the 1076s have a lighter recoil spring than the 1006/1026s, etc. I suspect they were set up for the lighter FBI loads. I just preferred the 1006s and 1026s due to their heavier slides, and slightly better ballistics due to the longer barrel

[kihnspiracy]

I had a couple of Smith 1006's back in the day. Sold them all when mags got pricey. Now I have a Glock 40 as my sole 10mm pistol.

[JRB]

Those of you gents with the 10mm GP100 - any chrono or other data on 'hot' 10mm loads from Underwood, etc in the GP100? Any loads it particularly favors for accuracy?

[Lester Polfus]

Those of you gents with the 10mm GP100 - any chrono or other data on 'hot' 10mm loads from Underwood, etc in the GP100? Any loads it particularly favors for accuracy?

RevolverGuy has some chrony data from the 10mm GP100, IIRC.

[19852+]

Now a Winchester 1873 in 10mm would be awesome !

[jtcarm]

I have the MC 10mm. I like it but I’m pretty frustrated with cast bullet accuracy. The chamber throats are a bit on the large side and a bullet sized .402 slips through a lot more easily than I’d like.

Jacket bullets shoot well, Sig Elite 180 FMJ TC groups a little over 2” at 25 yards from the bench. That’s a pretty hot one, too. It consistently averages around 1,250 FPS from the 4” revolver.

[Rick R]

Those of you gents with the 10mm GP100 - any chrono or other data on 'hot' 10mm loads from Underwood, etc in the GP100? Any loads it particularly favors for accuracy?

The only chrono data I had for my 3” 10mm GP was my hand loads. It gets 1205fps with a 180gr Gold Dot over BE-86, the same load in my 5” 10mm SR1911 is 1250fps which is where I wanted my 180gr SD loads to be. Both guns seem to prefer 180-200gr bullets over the lighter 155gr I used in my previous 10mm.

[Zeke38]

Good info, thanks! 180 grain bullet looks like the weight to go to take advantage of the 10mm bore. 1250/180 load is more than I want to attempt with a 357. This load would handle 95% of my field problems, as this gun is dedicated to that purpose.

[jtcarm]

Good info, thanks! 180 grain bullet looks like the weight to go to take advantage of the 10mm bore. 1250/180 load is more than I want to attempt with a 357. This load would handle 95% of my field problems, as this gun is dedicated to that purpose.

Personally I prefer heavy cast bullets with a wide flat nose around 900 FPS for that purpose.

Such loads are good out to 50 yards or a hair longer, predictable terminal performance, and a whole lot easier on the gun and me.

Thinking of putting the 10 mil on the block and going for the 5-shot .44 special.

[sparkyv]

Very nice Zeke38. I thought shooting 10mm in an autoloader was fun. In a wheelgun it's outstanding!

[Rick R]

Personally I prefer heavy cast bullets with a wide flat nose around 900 FPS for that purpose.

Such loads are good out to 50 yards or a hair longer, predictable terminal performance, and a whole lot easier on the gun and me.

Thinking of putting the 10 mil on the block and going for the 5-shot .44 special.

I cast a 200gr WFN NOE bullet that’s around 1,100fps out of my SR1911.

https://noebulletmolds.com/site/wp-content/uploads/2017/05/403-198-WFN_PB_Y1_Sketch.jpg

Six gallon jugs of water won’t stop that load at 20’. It’s not hard to throttle it back to your 900fps load.

[entropy]

Dammit. Last thing I need to spend money on is another gun. Impractical. I look at the 2k of .40 HST stashed on the shelf and whisper “practical”....

[Zeke38]

Just got back from the range today with the Ruger 10mm. Gun shot well and seemed to like handloads 165 grains up to 180s. The Altamont "Ropers" that are OEM began to "squirm" under recoil today despite frequent tightening. This is identical behavior to the "Altamont Ropers" I put on my GP/MC 357 a couple years ago.

GOOD BYE ALTAMONTS, AGAIN!

Back to my old Standby Hogue fingerless grip from their 44 Special.

[Rock185]

Our range had been closed due to wildfire danger, but just reopened. I was able to get out there today and shoot my GP100 10MM 5" a bit. I also did some chronographing.

Winchester Silvertip, that averaged 1200+ FPS when previously tested in various 5" autoloaders, averaged 1147 FPS in the Ruger revolver. Buffalo Bore 180 grain JHP, that averages 1380 FPS in my 5" autoloader, averaged only 1306 FPS in the Ruger. Some 165 grain plated hollow point reloads I tested averaged a bit over 1300 FPS, just as in the auto.

I expected velocities in the revolver would be higher than in the auto. This was common with two S&W model 610 5" revolvers I used to own, but not at all so with the Ruger revolver, at least with the ammo I tested today. I try not to assume, because the chronograph often surprises me.

[Zeke38]

Rock 185, thanks for the data using the GP 5". I figured 50-75fps with a revolver due to cylinder gap. How do you like your 10 in the GP? 180s are what I am choosing to run in the GP it appears to like them best.

[Rock185]

Zeke38, I was just interested to see if there were any functional issues, and in chronographing a couple loads previously tested in the semi-auto. I wasn't paying much attention to accuracy, but did notice the BB 180s were the most accurate in the couple targets I shot with the three different weights. May have been a fluke though, have to shoot it a lot more to determine anything definitive. My favorite 10MM bullet weight for many years has been the 165-170 grain. I have some 165 grain Underwood coming to test...

BTW, I replaced the factory grips with the MC type. Fit me much better than the smaller, slicker stock grips

[jetfire]

Just got back from the range today with the Ruger 10mm. Gun shot well and seemed to like handloads 165 grains up to 180s. The Altamont "Ropers" that are OEM began to "squirm" under recoil today despite frequent tightening. This is identical behavior to the "Altamont Ropers" I put on my GP/MC 357 a couple years ago.

GOOD BYE ALTAMONTS, AGAIN!

Back to my old Standby Hogue fingerless grip from their 44 Special.

The factory grips on the 5 inch 10mm are just awful. I ditched the ones off mine after one range session in favor of the Match Champion style wood grip.

[Dave T]

Now a Winchester 1873 in 10mm would be awesome !

The toggle-link action of the '73 was never envisioned or intended for anything like the pressure of a full house 10mm (37,500 psi as I recall). A modern made (best steel and heat treatment) Model of 1892 would be a wiser choice. Post WWII converting 32 WCF '92 to 357 Magnum became almost a cottage industry, at least in the West.

Dave

PS: Yes, I know the Italians are making repro '73s in 357 Mag, and what a dumb idea that is. They get away with it largely because all the CAS (IPSC in Boots) folks shoot wimpy 38 special loads in them.

[Zeke38]

Jetfire: I have a couple sets of those Altamont "Ropers" up for adoption. Running the MC grip on mine, also. Bought the first pair of "Ruger Ropers" for the MC and quickly realized my mistake, and the second pair came on the 10 but fit better, than the aftermarket. They felt OK but wiggled loose after 24 rounds of fire. Have the Hogue Ruger 44 Spl grip on the 357 MC.

[Spartan1980]

I have the MC 10mm. I like it but I’m pretty frustrated with cast bullet accuracy. The chamber throats are a bit on the large side and a bullet sized .402 slips through a lot more easily than I’d like.

Put a .403 in it and I bet those groups shrink.


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